10 DPO today. Tested last night at 9 DPO and saw the faintest of lines within the valid time frame. This morning's test was also taken within the time frame. I KNOW, tests should not be opened however this test had no window AND the line was visible before taking the cassette out. There was a shadow cast due to the casing so I had to take the test out to snap a pic. I plan to retest in the am. Here is my test. More pics in comments.

Also I know that there is more than one reason a test should not be taken apart, but I wanted to get opinions and the damn shadow kept getting in the way lol.